Tool for making and repairing casings for wells, boreholes, or the like



Mar. 27,` 1923.

P. W. HALLVARSON.

TOOL FOR MAKING AND REPAIRING CASINGS FOR WELLS, BOREHOLES, 0RTHEK'LIKE.

FILED MAY I7. i922.

D nnunn il ll ymmgf Wxaesses Patented Mar. 27, 1923.

unirse sra'rss y matiz amaai ortica.

PETER WILLIAM HALLVARSON, OF CALGARY, ALBERTA, CANADA.

TOOL FOR MAKING- AND REPAIRING CASINGS FOR WELLS, ABOREHOLES, 0R THELIKE.

Application led May 17, 1922. Serial No. 561,772.

To all whom t may concern.'

Be it known that I, PETER WILLIAM HALL- vARsoN, a subject of the King ofGreat Britain and lrelandand residing at 207 Alberta Corner, in the cityof Calgary,

Province of Alberta, Dominion of Canada, have invented a certain new anduseful Tool for Making and Repairing Casings for Wells, Boreholes', orthe like, of which the 10 following is a specification.

Fig. l is a vertical elevation showing thex 2o device in a well or borehole.

Fig. 2 is a vertical section showing device ready for lowering intoposition` Fig. 3 is/a vertical section showing the devicein operation ofmaking the wall. f

Fig. 4 is a horizont-al cross section through the outer cylinder onlyshowing the orifices through'which the case formingdmaterial isdelivered.

Fig. 5 is a horizontal cross section showing the interior piston in itsrelation to the outer or main casing.

Similar characters refer to similar parts throughout the several views,-

a is a cylindrical container, 4within which plastic material is placed.L,19, is a base secured to the lower end 'of the said cylinder in whichbase a valve o, is secured. d, is a 'hollow piston fitted to the insideof the' cylindrical container a, and between the un- 40 derside of thesaid piston and the cap b, is a water cushion e. Ports f are provided inthe side Walls of the cylinder a, through which the plastic material isforced from the container. Ports g, are provided in the side walls ofthe piston d, w/hich correspond with the ports f afterv the waterforming the water cushion e has escaped through the valve c, in the baseb. h, is a connecting `rod between vthe top of the piston and aApressure exertin device i, mounted in the upper part of t e cylinder a,to force the the plastic mixture through the ports f, and g. lc, is acap member secured upon and enclosing the top of the cylinder a to whichcap is secured a cable or other suitable suspending means. Z, is aflexible Washer upon they outside of the container a, adjacent the portf which is provided with ducts m radiating from the container to theextremity through the said Washer which ducts direct the placing of theplastic material from the cylindrical container.

In operation a water cushion e is pro-- vided in the base of thecontainer, the water cushion raising the piston ci and closing the portsj'. The valve o in the base of the container is then closed and the caplc removed. Plastic material is placed in the cylinder a, until it isnearly filled. The pressure producer -i is then charged and the cap lcis secured in place. The pressure produ'cer may be a chemical cartridgeor may be a jet of compressed air or steam. The valve c in the base ofthe container is opened to allow of the escape of the water cushion eand while this water cushion e isescaping the apparatus is lowered tothe desired depth. As the water escapes the pistoni d'drops within thecontainer until the ports f and g correspond and during the dropping ofthe piston the rod a, connected between the piston and the pressureproducer, opens a valve and allows a pressure to be exerted upon theplastic material within the container and forces the said material.through the ports f and g. The flexible collar z', due' to pres-` sureof the plastic material, expands andv delivers the said material to thewall of the well or bore hole with t-he minimum loss of pressure andcontinuous oscillating of the 90 apparatus within the well or bore holeinsures a smooth surface.

What I claim iszl. A tool for making and repairing casings lfor wells,bore holes. or the like, comprising a cylindrical container, an outletat the lower end of the said container controlled through a hydraulictiming valve, and a means of exerting pressure within the saidcontainer, all substantiallyfas and'for the purposes described.

2. A tool for making and repairing casings for Wells, bore holes' or thelike, comprising a Cylindrical container; a piston mounted therein, ahydraulic chamber between the base of the cylinder and the base 5 of thepiston, ports Within the Walls of the cylinder near its hase, ports inthe side walls near the base of the said Diston.. and

means of exerting pressure Within the container to force materialstherefrom through the said ports.

PETER WILLIAM HALLVARSON.

Witnesses: v

Emo L. HARVIE, G. A. CORTIGAN.

